Trying to sync to Outlook. When I send an error message it says "Confirm that the URL of your Sugar site is correct in tools--sugar options". Any suggesitions?

Any idea how to fix this problem? My broker appears to have the same settings in her Sugar and it works fine. I have Outlook 365. Did I download the wrong plugin? Not sure what to do, but I can't email from Outlook and store in Sugar, nor can I email from Sugar at all.